The invention provides a control method and system for reducing creeping jitter of an electric vehicle and a medium The method comprises the steps that when a VCU request torque dynamic response signal is received, a VCU request torque initial value is obtained, a VCU torque request change value is obtained according to a calculation period, and if the VCU torque request change value is smaller than the VCU torque command minimum step length precision, the VCU torque command minimum step length precision is determined to be smaller than the VCU torque command minimum step length precision. If yes, the VCU torque request change value is set to be 0, and the MCU command torque is kept unchanged; during creeping running, when a vehicle encounters road slope change or a driver slightly steps on a brake, and it is judged that the VCU torque request change value is smaller than the VCU torque command minimum step length precision, the VCU request torque is kept unchanged, the MCU command torque does not change in response to the change of the VCU request torque, and therefore the motor torque does not change; jittering caused by unsmooth output torque of the motor is avoided, and the smoothness and comfort of low-speed crawling of the vehicle are improved.

    本申请提出一种减少电动汽车蠕行抖动的控制方法、系统及介质,该方法包括:当接收到VCU请求扭矩动态响应信号时,获取VCU请求扭矩初始值,以计算周期获取VCU扭矩请求变化值,若VCU扭矩请求变化值小于VCU扭矩命令最小步长精度,则设定VCU扭矩请求变化值为0,MCU命令扭矩保持不变;在蠕行行驶时,当车辆遇到路面坡度变化或驾驶员轻踩刹车时,判断VCU扭矩请求变化值小于VCU扭矩命令最小步长精度时,令VCU请求扭矩保持不变,则MCU命令扭矩不会响应所述VCU请求扭矩的变化而变化,从而电机扭矩不会发生变化,避免了电机输出扭矩不平顺产生的抖动,提高了车辆低速蠕行的平顺性和舒适性。


    Access

    Download


    Export, share and cite



    Title :

    Control method and system for reducing creeping jitter of electric vehicle and medium


    Additional title:

    减少电动汽车蠕行抖动的控制方法、系统及介质


    Contributors:
    LIU HUI (author) / LI JUN (author)

    Publication date :

    2024-05-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



    Electric vehicle creeping control method

    HE WEI / ZHOU YINGSHUANG / GUO JUN et al. | European Patent Office | 2020

    Free access

    Creeping control method and system for electric vehicle

    PENG JIANKUN / GUO XIN / KONG WEIYUE et al. | European Patent Office | 2024

    Free access

    Creeping torque output control method and system, storage medium and vehicle

    YE BINGFEI / SUN TIANLE / YAN MENG et al. | European Patent Office | 2022

    Free access

    Creeping torque control method and system, readable storage medium and vehicle

    YOU DAOLIANG / LIN YUMIN / WEI GUANGJIE | European Patent Office | 2022

    Free access

    Creeping control method of pure electric vehicle, vehicle control unit and electronic equipment

    OUYANG ZHI / YANG JIEJUN / LU XIONG et al. | European Patent Office | 2024

    Free access